The St. Louis County Police serve 20 municipalities and unincorporated parts of the county.
Although this office is in Clayton, it normally does not play an active law enforcement role in that city. In special cases, the office provides assistance with services such as its SWAT team.
The department is composed of four divisions: patrol, special operations, criminal investigation and operational support. St. Louis Regional CrimeStoppers, which offers rewards for crime tips, also is based at this location.